I might also point out that Mac had keyboard shortcuts before Windows existed, so it's not really fair to describe them as the "different" one when MS chose their own, different shortcuts for Windows.

So, really, it's Microsoft that decided "we're different".

Also, as somebody who sort of lives in the terminal, the lack of the Command/Ctrl distinction is one of the things that really bothers me about Windows. In default GUI applications, application shortcuts use Command, and Ctrl is used almost exclusively for headline-style shortcuts (ctrl-k for kill line, ctrl-a for home, ctrl-e for end, etc). Ctrl-a Ctrl-shift-e is kind of baked into my brain as "select whole line".

Not to mention the muscle memory for pressing CTRL in the corner of the keyboard rather than CMD where Alt is.

Though I will say that having "Copy" (cmd-c) being different from ^C (ctrl-c) was kind of nice. Though Terminal has done a nice thing of making it so if you highlight text, Ctrl-C copies the first time you press it, and sends ^C the second time.